<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>字体</title>
    <!--内部引入-->
    <style>
        h1{
            font-size: 100px;
            color: red;
        }
    </style>
<!--外部引入-->
    <link rel="stylesheet" href="../css/1.css">
</head>
<body>
<div>
<h1>今天开始变漂亮</h1>
</div>
</body>
</html>